2. Why does the temperature of
different layers of the atmos-
phere vary?
a. because air temperature
increases as altitude increases
b. because the amount of energy
radiated from the sun varies
C. because of interference by
humans
d. because of the composition of
gases in each layer

D. because of the composition of gases in each layer

tsd is temerature dependent sex determination.

tsd: it is a type of environmental sex determination in which the temperature experienced during embryonic/ larval development (ambient temperature for development) determine the sex of the offspring.

crocodile displays the tsd where the ambient temperature of the developing egg determines the individual's sex. for example in the american alligator's eggs, incubation at 33 ºc produces mostly males, while incubation at 30 ºc produces mostly females. so if the american alligator's egg will get the ambient temperature (33 degree celcius)during embryonic development from egg, the offspring will be male and same for the female sex determination.